Furniture-tread.



v. & s.1. VON DER LIN.

FURNITURE TREAD.

APPLICATION FILED 050.12. 1914.

Patented Dec. 21, 1915.

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UNITED STATES PATENT GFFICE. I

VALENTINE VON DER LIN AND SIMON JULIUS VON DER LIN, OF NEW YORK, N. Y.

FURNITURE-TREAD.

Specification of Letters Patent.

Patented Dec. 21, 1915.

Application filed December 12, 1914. Serial No. 876,772.

of New York, have invented certainnew and useful Improvements in Furniture- Treads, of which the following is a specifi cation. p p 7 Our improvements relate to the furniture tread set forth in our concurrent application Serial No. 820,419, filed Feb. 24th. 1914., allowed August 25th. 1914, the distinctive feature of which structure is a base plate adapted for attachment to a furniture support,'a guide post on said base plate, an externally threaded tread member slidable on said guide post, interlocking means for preventing the rotation of saidtread memher on sald guide post, and a nut sleeve rotatably mounted on said base plate and engaging the threaded portion of the said tread member, for the purpose of afiording a simple but eifective adjustabletread for application to the legs or supports of tables or other articles of furniture, whereby variations in length of support or inequalities of floor surface may be quickly and conveniently compensated for. I v

The present invention concerns more particularly the means employed for coupling the rotatable nut sleeve to the base plate, whereby the application of the device to a table. leg or otherfurniture support is facilitated. It also includes the combination withthe externally threaded tread member of means whereby the actual tread or con-v tact surface may be changed or duplicated, all as hereinafter more fully set forth.

In the accompanying drawings, Figure 1,

is an elevation of the lower part of the leg 7 of a table or other article to which our adjustable tread is applied; Fig. 2, is a central vertical sectional elevation thereof; Fig. 3, is a top view of the tread member; Fig. 4, a side elevation thereof; Fig. 5, a top view of the rotatable nut sleeve; Fig. 6, a section of the tread member, showing a removable bearing tip; Fig. 7, a sectional elevation showing the use of a caster tread; Figs. 8, and 9, sectional details'showing modifications in the means for securing the base plate to the furniture support.

The base or stud plate B,'may be attached to a furniture leg or support L, by the use of any well known mechanical expedient, as

plate, will be free to rotate thereon.

by the screw 1), shown in Figs. 2, and 7, the screws 6, 6, shown in Fig. 9, or the socket 6 shown in Fig. 8, according to the character or shape of the leg or other support to which our adjustable tread is to be applied. The base plate B, consists essentially of an annular flange or. disk from the lower side of which projects centrally the stud 6*, which performs the function of a guide post and lateral support for'the tread member T, the latter being formed with a central recess or socket t, the side walls of which embrace the sides of the stud Z).

The body of the tread T, is cylindrical, and is formed with the peripheral male thread t", for engagement with the female screw thread 8, of the adjustable sleeve S. This adjustable sleeve S, is locked rotatably on the base plate B, by means of screws 8, s, mounted radially in the nut sleeve S, in such manner that they may be adjusted so as to cause their inner ends to protrude into the annular groove 6 formed in the peripheral edge of the base plate B. Thisperipheral annular groove 12 is preferably V shaped in cross section, and the ends of the screws 8, s, are conical to correspond; and the design is to have the conical end of each screw fit snugly within the groove 6 when the head of the screw is driven home against its seat in the sleeve S, without binding against the sides of. the groove, so that the sleeve, while positively coupled to the base That is to say, when the base B, is secured to the furniture support L, by means of the screw 7), or equivalent mechanical expedient, the

sleeve S, is rotatable upon the base plate B,

this result it is obvious that the sleeve S,

alone must turn,the tread member T, moving only longitudinally as related to the axis of the guide post b. In other words the sleeve S, and the base plate B, are coupled together by interlocking means which permit the rotation of the sleeve S,th'e tread T, and the stud Z), are coupled together by interlocking means which prevent the rotation of the tread T, but permit of its being slid longitudinally on said guide post 6", in either direction to increase or diminish the extent of protrusion of the bearing surface 6 as related to the sleeve S, and hence as related to the leg or support L.

As stated in our concurrent application for patent hereinbefore referred to, this interlocking of the guide post b with the tread T, may be effected in various ways, and we do not limit ourselves in this respect. As shown herein the stud post I), is made rectangular in cross section, the socket t,- in the tread T, being correspondingly formed.

- l/Vhatever the interlocking means employed lower portion of the tread itself, as in Figs. l, 2 and 4: or of a caster roller as shown in Fig. 7 ,as maybe found most expedient in adapting our device to various special uses and-purposes, so that we do not restrict ourselves inthis respect. In fact the tread T, :maybe provided with any form of caster bearing or contact, so that it is to be understood herein that by the term tread we mean to designateany floor or surface contacting device engaging with andcontrolled by the. adjusting nut or sleeve S. 1

In this connection however we may state that an incidental feature of our'present invention consists in providing the tread member T, with a detachable contact tip 6 which when worn or damaged may be replaced by another. This bearing tip 25, may be made of any desired or suitable materiahas rubber vulcanized more or less, metal where necessary, or any substance or composition found most expedient for specific requirements and conditions of use. The contact tip 25 may obviously be detachably'secured to the tread-member T, by various mechanical expedients, a simple method being shown in which the lower side of the tread member T, is tapped with'a screw thread 23*, for the reception of the screw stud 15 of the contact tip 25 as shown in Fig. 6. This female tapt may also be utilized for the attachment of a caster bearing as shown in Fig. 7.

By the use of thecoupling screws 8, on' the nut sleeve S, in conjunction with the Copies of this patent may be obtained for five cents each, by addressing the Commissioner-"of Patents, Washington, D. C.

annular groove in the base plate B, we are enabled to apply the tread device as a whole to ata'ble leg 'or furniture support with convenience and facility. Thus by turning back the screws 8, until their inner ends are withdrawn from the groove 6 the base plate B, may be Withdrawn from the sleeve S, and'tread member T, and

screwed to the table leg L, or other support, and the sleeve S, and tread T, then reapplied to the base plate, and secured thereto to secure'by Letters Pate'ntis, 1

1. A furniture tread of the character designated comprising a base plate, formed with: an annular groove, means for attaching said base plate to a furniture leg or -sup-' port,=a' guide post on saidbase plate, an

externally threaded treadmember slidable on said guide post, interlocking means for preventing the rotation of-said tread member on said guide post, and a nut rotatably mounted upon and attached to said base plate 'by means of screws engaging the walls of the aforesaid annular groove on said base plate and also formed with a screw thread engaging the threaded portion of the said tread member, for the purpose described.

A furniture tread of the character des- I ignated' comprlsing" a base plate formed, with an annular groove, means for attachingsaid baseplate to a furniture leg or support, a guide post onsaid base plate, an externally threaded tread member slidable on'said guide post, interlocking means for preventing the rotation of said tread member'on said guide post, and'anut rotatably -mounted upon and attached to said base plate'by means of protuberances engaging the aforesaid annular groove in said base plate and also formed with a screw thread engaging the threaded portion of said tread member, for the purpose described.

VALENTINE VON DER LiN. SIMON JULIUS VON. DER LIN.

Witnesses":

GEO. WM. MIATT, DOROTHY MIATT. 

